Hydroxyethyl cellulose/bentonite/magnetite hybrid materials: structure, physicochemical properties, and antifungal activity

Алексеева, О. В.; Родионова, А. Н.; Bagrovskaya, N. A.; Агафонов, А. В.; Носков, А. В.

doi:10.1007/s10570-017-1212-2

Cited by 20 publications

(5 citation statements)

References 46 publications

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“…X-ray diffraction patterns of the basic bentonite suspension and bentonite-HEC mixtures reveal that the interlamellar space (d 001 = 12.36 Å) increases slightly to 12.72, 13.47, 14.00, 13.96 and 13.67 Å when adding a (HEC) concentration of 0.02, 0.05, 0.1, 0.15 and 0.2 wt% to the basic bentonite suspension, respectively. The obtained results can be explained as follows: the increase in (d 001 ) for HEC concentrations (≤ 0.1 wt%) is attributed to the intercalation of polymer chains onto the clay cavities, which is enabled by the presence of polar groups in HEC [2]. The intercalate polymer amount is reduced at HEC concentrations of 0.15 and 0.2 wt%, which can be attributed to foam creation, i.e.…”

Section: Effect Of Hec On the Basal Space Of Bentonite Suspension (Xrd)mentioning

confidence: 89%

Hydroxyethyl cellulose as a rheology modifier for water-based drilling fluids formulated with Algerian bentonite

Ouaer

Gareche

2019

J Braz. Soc. Mech. Sci. Eng.

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Under the different geological conditions of wells and during the drilling operation, some of the water-based drilling fluid compositions are sometimes not efficient for the drilling success of the oil and gas wells (case of the Algerian oil and gas wells). In the use of bentonite in drilling fluid applications, the addition of hydroxyethyl cellulose (HEC) is recommended to obtain good rheological properties of the fluid. In this research, we investigate the rheological behaviour in steady state, and dynamic shear rheology of drilling fluids formulated based on an Algerian bentonite with a fixed concentration of 3 wt% and a water-soluble polymer HEC of high molecular weight (~ 9.5 × 10 5 g/mol) at different concentrations ranged from 0.02 to 0.2%. All the results obtained by a controlled stress rheometer have been commented by taking the interaction between the clay and the polymer molecules into consideration, to highlight the effect of HEC on the rheological properties of bentonite suspensions. Herschel-Bulkley (H-B) model was used to fit and interpret the experimental data. A significant increase in the rheological properties of the mixture bentonite-HEC with the increase in HEC concentration has been shown. These properties reached the maximum at HEC concentration of 0.1 wt%; beyond this value, they decreased. X-ray diffraction test performed on the different samples also allowed understanding the rheological behaviour of the system bentonite-HEC. Indeed, the HEC could intercalate the bentonite interlayer and formed link bridges between bentonite particles below a critical concentration of 0.1 wt%. Based on the results of the study, it is recommended to choose the optimum concentration of HEC to be added to the bentonite suspension to ensure the optimum rheological characteristics of the drilling fluids. Keywords Water-based mud • HEC • Algerian bentonite • Rheological properties • X-ray diffraction List of symbols Roman symbols G′ Storage modulus (Pa) G″ Loss modulus (Pa) G 0 Elastic modulus (Pa) k Consistency index (Pa s n) n Flow index w Pulsation (rad/s) Greek symbols α Time constant (s) Shear rate (s −1) λ X-ray wavelength (Å) 2θ Scattering angle Viscosity of the polymer solution (Pa s) 0 Zero shear rate viscosity (Pa s) ∞ Infinite shear rate viscosity (Pa s) τ Shear stress (Pa) τ c Yield stress (Pa)

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Section: Effect Of Hec On the Basal Space Of Bentonite Suspension (Xrd)mentioning

confidence: 89%

Hydroxyethyl cellulose as a rheology modifier for water-based drilling fluids formulated with Algerian bentonite

Ouaer

Gareche

2019

J Braz. Soc. Mech. Sci. Eng.

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“…Abouzeid et al conducted a study which demonstrated that combining sodium alginate, a natural and biodegradable polymer matrix, with activated charcoal, renowned for its exceptional adsorption properties of methylene blue dye [31]. Alekseeva et al [32] synthesized and studied the chemical, and magnetic properties of the hydroxyethyl cellulose/bentonite/magnetite nanocomposite. Moreover, the authors studied the optical, mechanical, and antifungal activity of hydroxyethyl cellulose/bentonite/magnetite films.…”

Section: Introductionmentioning

confidence: 99%

Oxidized Cellulose Nanofibers Decorated with Magnetite as Efficient Bioadosrbent for Organic Dyes

et al. 2023

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This article describes the immobilization of magnetite (Fe 3 O 4 ) nanoparticles on TEMPO-oxidized cellulose nanofiber (TEMPO-CNF) through the co-precipitation of iron salts by the alkaline medium. TEMPO-CNF and TEMPO-CNF/Fe 3 O 4 were confirmed by XRD, TGA, SEM, TEM, BET, and AFM. Characterization of the samples successfully showed the preparation of cellulose nanofibers with a diameter ranging from 10-15 nm and homogenous and uniform magnetic nanoparticles with a diameter of ~ 10 nm. The ability of the synthesized nanocomposite for methylene blue (MB) adsorption, as a cationic dye model, was examined. At pH 7, the highest adsorption efficiency was observed. The isotherm, kinetic models, and enthalpic contributions were calculated to evaluate adsorption experiments. With an adsorption capacity of around 303 mg/g, pseudo-second-order, and Langmuir isotherm provided the best interpretation adsorption process. In addition, the thermodynamics parameters have been evaluated from direct measurement based on Isothermal Titration Calorimetry. The current results showed that TEMPO-CNF/Fe 3 O 4 nanocomposite is a promising green bioadsorbent for organic dye removal for water purification.

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“…Bentonite type layered silicate clays, due to their high specific surface area and cation-exchange ability, low cost and non-toxicity are often used as fillers for cellulose ethers during the preparation of polymer composites. The literature provides information on the structure and properties of composites based on polysaccharides modified with silicates (Alekseeva et al 2017a , b , 2019b ; Delhom et al 2010 ; Lavorgna et al 2014 ). Special attention is paid in the publications to the practical application of such composites as biodegradable packaging materials, materials for tissue engineering.…”

Section: Introductionmentioning

confidence: 99%

Structure, physicochemical properties, and adsorption performance of the ethyl cellulose/bentonite composite films

2022

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Ethyl cellulose (EC) was filled with bentonite (Bent) particles by mechanical dispersion to produce composite film materials that were studied using various methods. According to X-ray diffraction (XRD) analysis, the inter-chain separation length was larger in EC/Bent composite then those in pure polymer. Infrared spectrometry indicated a formation of hydrogen bonds between the hydroxyl groups of EC and the silanol groups of clay. Tests showed an increase in tensile strength of the polymer material (by 35–40%) when doped with bentonite. It was found that modification of polymer with bentonite resulted in increasing of the adsorption efficiency of methylene blue (MB): the equilibrium concentration of MB ions in adsorbent phase increased 2.5 times. The MB adsorption kinetics obeyed the pseudo-first-order mechanism. Isotherms were in good agreement with Langmuir model. For the composite, the maximum monolayer adsorption capacity was 4 times higher than that for pure polymer.

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Hydroxyethyl cellulose/bentonite/magnetite hybrid materials: structure, physicochemical properties, and antifungal activity

Cited by 20 publications

References 46 publications

Hydroxyethyl cellulose as a rheology modifier for water-based drilling fluids formulated with Algerian bentonite

Hydroxyethyl cellulose as a rheology modifier for water-based drilling fluids formulated with Algerian bentonite

Oxidized Cellulose Nanofibers Decorated with Magnetite as Efficient Bioadosrbent for Organic Dyes

Structure, physicochemical properties, and adsorption performance of the ethyl cellulose/bentonite composite films

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